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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

Joyce Water Supply

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015ND20ND
20160.0330 ppm220.0330 ppm
2017ND20ND

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2012-05-24AD65707ND
2012-05-24AD65707ND
2013-11-05AD86646ND
2013-11-05AD86646ND
2014-02-24AD89359ND
2014-02-24AD89359ND
2015-09-0435206364004ND
2015-09-0435206364004ND
2016-12-28352884960100.0330 ppm
2016-12-28352884960100.0330 ppm
2017-03-3035303637005ND
2017-03-3035303637005ND